.websocket {
  width: 800px;
  height: 600px;
  border: 1px solid #ccc;
  margin: 100px auto 0 auto;
  text-align: center;
}
.receive {
}
#receive-box {
  width: 300px;
  height: 200px;
  overflow: auto;
  margin: 0 auto 24px auto;
}
#msg-need-send {
  width: 300px;
  height: 100px;
  resize: none;
  border-radius: 10px;
}
#send-btn {
  border: none;
  border-radius: 5px;
  background: #25d1ff;
  padding: 5px 10px;
  color: #fff;
  cursor: pointer;
}
#exit {
  border: 1px solid #ccc;
  border-radius: 5px;
  background: none;
  padding: 5px 10px;
  cursor: pointer;
}